Pen box



FIG. 1 is a top rear perspective view of a pen box, showing my newdesign;

FIG. 2 is a top front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dashed lines shown in FIG. 2 depict portions of the pen box thatform no part of the claimed design.

CLAIM The ornamental design for a pen box, as shown and described.